I posted this in another thread, but I think it could stand to be repeated due to all of the people complaining about battery life and charging/discharging their phones so much: How to prolong lithium-based batteries Synopsis: Over the lifetime of your battery, charging it on USB at the slower charge rate due to lower current is going to be healthier for your battery. Every time your battery heats up or gets completely discharged (called deep cycling) it will diminish its ability to hold a charge even if it is a miniscule amount. It does not matter if the battery gets hot from being left in a hot car, from heavy use (this is why some apps have a battery temp indicator) or from charging it very quickly... heat damages its capacity. Even though it is a very small amount, every time you charge your battery it will heat it up slightly and the higher the current you use to charge it (and quicker it charges) the higher the temp will get. Sure after 10 or 20 charges there is no difference, but over the life of the battery at 1000 charges it WILL make a difference how you charge it. These batteries will last longest if you just give them little spurts of charge here and there and keep them between 40 and 60 percent charge capacity. They do not have a memory and the only reason to fully charge and discharge is for your own convenience or so that the phone can learn the high and low voltages over time to more accurately display the battery percentage meter. Seeing as the battery life is the biggest issue on this phone it is important to make sure everyone understands how these things work. Hope this helps!